package com.example.demo.web;

import java.util.Random;
import java.util.concurrent.TimeUnit;

import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {
	private final Logger logger = Logger.getLogger(getClass());

	@Autowired
	private DiscoveryClient client;

	@RequestMapping(value = "/hello", method = RequestMethod.GET)
	public String index() throws Exception {
		
		ServiceInstance instance = client.getInstances("hello-service").get(0);

		int sleepTime = new Random().nextInt(3000);
		logger.info("sleepTime:" + sleepTime);
		TimeUnit.MILLISECONDS.sleep(sleepTime);

		logger.info("/hello,host:" + instance.getHost() + ",service_id:" + instance.getServiceId());
		
		return "Hello World";
	}
}
